The ducted fan is meant to be a stand-in for a model jet engine, based around a high ... a variable nozzle to more finely control the “exhaust” of his engine. This system is also 3D printed ...

NASA's "quiet" new supersonic jet, the X-59, just passed a key engine test, bringing it closer to its first flight later this ...

The engines were also angled slightly, helping to blow their hot exhaust fumes outwards and away from the fuselage. Aside ...

Flaps in the engine nozzle point up or down to “steer” the jet exhaust, making the airplane more responsive and maneuverable. In a two-engine airplane like the F-22, directing the exhaust from ...

The gas exhaust velocity is horrendous and very hot. But to be fair, going back to it, those rockets were the only option they really had in terms of enough propulsive force in a small form.